Generate binary file with given structure

[bypeClealaMaroa]

I have a device witch use binary format style config, and i have to generate that files on-the-fly.File structure must consist of a number of configuration settings (1 per parameter) each of the form:

• Type
• Length
• Value

where:

• Type: is a single-octet identifier which defines the parameter
• Length: is a single octet containing the length of the value field in octets (not including type and length fields)
• Value: is from one to 254 octets containing the specific value for the parameter

I have a corresponding table \[code\] Type_code[int] => { Type_length[int] => Value[int/string/hex/etc.] }\[/code\]How to parse that table to that binary format?And, second way, how to parse that binary file, to php array format back?